In an interview with the Associated Press, Haute 100 lister Serena Williams opened up about her cameo in fellow Haute lister Beyoncé’s HBO special Lemonade. The tennis star was seen dancing during the music mogul’s song “Sorry.” Like with the many starlets that was seen in the special, including Zendaya, Amandla Stenberg and Quvenzhané Wallis, Williams’ appearance was a well kept secret.

During the interview Williams revealed how the cameo came to be. She said, “I have known the director since I was like nine years old. I know Beyoncé pretty well, so they were like, ‘We would love for you to be in this particular song. It’s about strength and it’s about courage and that’s what we see you as.'”

The only instruction the 34-year-old received was to just dance. Williams continued, “She told me that she just wants me to dance, like just be really free and just dance like nobody’s looking and go all out. So that wasn’t easy in the beginning, but then it got easier. … I thought that particular song on the visual album was really a strong song, and it was also really fun at the same time.”

In other Williams news, both Serena and Venus will soon be off to Rio de Janeiro to take another stab at the Olympic gold. It will be the first time the tennis duo sisters will play together since the 2014 U.S Open. Both sisters have three golds in doubles, from the 2000, 2008 and 2012 Olympics. In addition to having golds in doubles, both Serena and Venus have individual golds. Venus won her gold at the 2000 Sydney Games, while Serena won her gold 12 years later at the 2012 London Games.

As wild card contenders, the sisters will open against Andreja Klepac and Katarina Srebotnik of Slovenia. If they make it to the finals, they may compete against Martina Hingis and Sania Mirza in the final.